Several replies and answers

[mt3t3l1]

No: HPFGUIDX 138181

--- In HPforGrownups at yahoogroups.com, "M.Clifford" <Aisbelmon at h...> 
wrote:

> This is good canon to support that the potion did legilimency on the
> drinker. If they got that far then they *must* drink, if Voldie
> *wants* them to drink, it means he's getting something out of them
> drinking. I reiterate DD tells Harry that Voldie would want
> information at this point, so put two and two together and its easy.
> Voldemort invites drinking because it gets him the information he 
needs. 
> This trails us back to the basin being a pensieve, Voldie himself
> probably wouldn't have to drink, if this was his pensieve then he
> could just swirl his finger about and see what was in there like DD
> does with his pensieve.

Thanky, Valky. I think you've answered my question in Post#138077. I 
couldn't figure out how Voldemort was going to "find out how they 
managed to penetrate so far through his defenses and, most 
importantly of all, why they were so intent upon emptying the basin." 
I had expected that some sort of alarm system would alert Voldemort, 
who would then apparate to the cave and take steps to protect his 
Horcrux. Arguing against that was DD's insistence that Voldemort does 
not know when one of his Horcruxes is destroyed.

However, your idea of the basin doing legilimency on the drinker and 
storing the memories as a Pensieve makes much more sense. Since 
Voldmort made it necessary for the person who finished the potion to 
drink water from the lake before removing the locket, that meant that 
the Inferi would rise, pull the drinker into the lake and drown him. 
Not much point in interrogating a drowned body. But if the basin had 
acted like a Pensieve and had already extracted the methods and 
motives of the drinker, these would then be available to Voldemort 
whenever he decided to come by and visit the Horcrux hidden there. 
And, since Voldemort expected that any drinkers would never leave the 
cave alive, it would make sense for the basin to refill with potion 
and reset itself.

Merrylinks